<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app" style="height:800px;width:100%;background-color: aqua;">

    </div>
</body>
<script>
    function CreatDrag(id) {    var oBox = document.getElementById(id);
    oBox.onmousedown = function(ev) {
        var ev = ev || event;
        var Y = ev.clientY;
        var X = ev.clientX;
        var ToTop  = document.getElementById(id).scrollTop;
        var Toleft = document.getElementById(id).scrollLeft;
        oBox.onmousemove = function(ev) {
            ev = ev || event;
            var subY = ev.clientY - Y;
            var subX = ev.clientX - X ;
            Y = ev.clientY;
            X = ev.clientX;
            ToTop -= (subY);
            Toleft -= (subX);
            console.log(ToTop)
            console.log(Toleft)
            if(ToTop>0){
                console.log("上滑")
            }else{
                console.log("下滑")
            }
            if(Toleft>0){
                console.log("左滑")
            }else{
                console.log("滑")
            }
            // document.getElementById(id).scrollTop  = ToTop;
            // document.getElementById(id).scrollLeft =Toleft;
        }
        document.onmouseup = function() {
            oBox.onmousemove = function() {
                null;
            }
        }
    }
}
    CreatDrag('app')
</script>
</html>